Improvement in tanks for asphaltic cement



C. M. WARREN.

TANK FOR ASPHALTIC CEMENT.

No. 178,491. Patented June 6,1876.

N.PEHS, PHOTO-L1TMOGRAFNER. WASHINGTQN. D C.

UNITED STATES CYRUS M. WARREN, OF BROOKLINE, MASSACHUSETTS.

IMPROVEMENT IN TANKS FOR ASPHALTIC CEMENT.

Specification forming part of Letters Patent No. 178,491, dated June 6,1876,: application filed December 3, 1875.

To all 'whom it may concern Be it known that I, CYRUs M. WARREN, ofBrookline, in the countyrof Norfolk and State of Massachusetts, haveinvented a new and useful Improvement in Tanks for Asphaltic Cement,which improvement is fully set forth in the following specification,reference being had to the accompanying drawing, in Which- Figure l is alongitudinal section of my apparatus. Fig. 2 is an end view. Fig. 3 is atop view. Y

Similar letters indicate corresponding parts.

The object of my invention is an improvement in the construction oftanks designed to hold or transport the hot residuum resulting from tbedistillation of coal-tar.

At the common temperature this residuum of so-called asphalt, hasordinarily they consistency of pitch, but contains oils that are more orless volatile at the temperature at which it is usually employed forroofing, paving, or other purposes, and at which, or a highertemperature, it is sometimes desirable to transport it from themanufactory to the place of consumption, thereby avoiding` the necessityof cooling this material in barrels to be finally broken up and Wasted,and also the expense of remelting and reheating.

This asphalt is now carted along the streets of cities in air-tighttanks, with a iire underneath or within the mass of combustiblematerial, which is heated to a high temperature. So long as thetemperature is kept below the boiling-point, probably no accident fromthe bursting of this air-tight tank would be likely to occur, but toprevent the possibility of such an occurrence 1 attach a condenser tothe top of the tank, so constructed as to prevent the escape of vaporsto any injurious extent, and.

at the same time establish a communication between the interior of thetank and the external air. If the distance the material is to betransported is so great as to necessitate the application of heat intransit, this may be done by any of the methods employed for similarpurposes, such as a furnace arranged in or under the tank, with hot-airor smoke-fines under or around the tank, or iiues passing through it, asin the common flue-boiler for generating steam.

The condenser, in the example ot my invention which is here shown, isplaced on the upper side of the tank, and its top and bottom are piercedby open upright tubes, which communicate with the interior of the tankand with the open air, the upper side of the condenser being providedWith a rim, Which surrounds the surfaces through which the tubes open,so as to make on the top of the condenser a receptacle into which theliquid asphaltum .is poured, and from which it is conveyed through thetubes into the interior of the tank. The space in the condenser whichsurrounds the tubes is filled With a suitable cooling material by meansof a pipe, which rises through the top of the condenser and extendsthrough the rim.

The letter A designates a tank or package for holding or transportingthe so-called asphalt or residuum of coal-tar, provided With a suitabledischarge-pipe and valve, B. The tank can be combined with any of theusual means for heating its contents-as, for example, with a furnace, C,under it, and suitable liues, which may surround or extend through v thetank. The tank is made of a convenient form for transportation to agreater or less distance, and upon its upper side is placed a condenser,D, provided with open tubes E ot' small diameter, which extend throughthe top and bottom of the condenser and open into the tank, the upperends of the tubes opening through the top of the condenser into the openair. The top of the condenser is surrounded by a rim, F, which inclosesthe open tubes E, and forms a receptacle into which I pour the liquidresiduum or asphalt, Which then enters the tank through the tubes E. Thespace within the condenser around the tubes E is filled with a suitablecooling material, for the purpose of condensing the vvapors rising fromthe heated asphalt and returning the product back again to the tank, andfor this purpose I prefer some oil or other substance ot' a higherboiling-point than water,

although the latter can be used, it' preferred. The cooling materialisintroduced into the condenser through the pipe G, which rises from thetop Aof the condenser above the level of the rim.

My invention enables one to transport the asphalt, or other contents ofthe tank, in a heated state to the place where it is to be used, or tokeep it until it is to be used, in a 'ATET GFFICE.

safe condition, the open tubes of the condenser serving to pervent theescape of vaporsy tending to injure the quality of the asphalt, and toprevent danger from overheating and from excessive pressure of thecontents of the tank.

What I claim as new, and desire to secure by Letters Patent, is

The tank or package A, for holding or transporting heated asphalt, orother substances7 in i combination Withx a condenser, D, provided withopen condensing-tubes E, serving also vhave hereunto set my hand andseal ,this 26th day of November, 1875.

GYRUS M. WARREN.

`Witnesses:

ALLEN LINCOLN, HBT. M. WARREN.

